The 10 richest tech billionaires are insanely wealthy. The poorest person on this list is worth $17.6 billion. All of them are men. Four of them dropped out of college. All come from either the U.S. or China. These men founded messaging services, revolutionized the way we shop for books, created computers, set the standard for operating systems, created social networks and more. With multi-billion dollar fortunes, many of these tech billionaires now donate significant sums to philanthropy. Others bought professional sports teams. And still others are trying to shoot things into space. They are a diverse group of entrepreneurs who've made a big impact on the daily lives of millions of people. These are the 10 wealthiest tech billionaires in the world right now.

Ma Huateng is a Chinese Internet entrepreneur. Nicknamed "Pony", Ma is the founder, president, chief executive officer, and executive board member of Tencent Holdings, Ltd., one of the biggest telecommunications companies in China. Pony earned his B.S. in software engineering in 1993, and, in 1998, Tencent with four friends. . One year later, the company launched Tencent QQ, an instant messaging service, which became very popular in China and put Pony on the road to his great wealth. Tencent soon became the largest instant communication service network in China. Along with its expansion, Tencent added more employees and eventually Ma was named chief executive officer, executive board member, and chairman of the board. Tencent grew in popularity with the introduction of such popular online multi-player games as, "League of Legends". Billed as "the Chinese AOL", Tencent now encompasses web portals, e-commerce, and multiple social networks as well.

#9 Michael Dell

Net worth: $20 billion

Country: US

Industry: Technology

Source of wealth: Self-made; Dell

Michael Dell was studying to be a doctor at the University of Texas in 1984 when he started a company called PC Ltd. building computers. He dropped out of college to pursue building computers full time. That company later became Dell. By the time he was 23-years-old, Dell went public and Michael Dell was personally worth $18 billion.

#8. Jack Ma

Net worth: $22 billion

Country: China

Industry: Technology

Source of wealth: Self-made; Alibaba

Just 20 years ago, Jack Ma was a modest English teacher who never could have even dreamed of the riches that would befall him in the following decades. In 1995, Ma visited the United States for the first time. He had recently started a side business, a translation company, to help capitalize on a recent Chinese export boom. It was during this visit to the U.S. that a friend showed Ma the Internet for the first time. This friend told Ma that anything he wanted could be found on the World Wide Web in an instant with the click of a button. So Jack searched for beer. In 1999, Jack brought 18 friends and family members together in his apartment and spent two hours pitching them his vision. Every single person bought in, giving Ma $60,000 to start Alibaba. On September 19th, Alibaba.com officially became the largest Initial Public Offering of all time. That $230 billion makes Alibaba $30 bigger than Facebook. In terms of market cap, it is also $30 billion bigger than eBay and Amazon COMBINED. Thanks to this smashing success, Alibaba founder, Jack Ma is now officially the richest person in China.

#7 Steve Ballmer

Net worth: $24 billion

Country: US

Industry: Tech

Source of wealth: Self-made; Microsoft

Steve Ballmer dropped out of Stanford's MBA program in 1980 to join his old Harvard friend Bill Gates at Microsoft. He was the company's first business manager and drew a $50,000 salary. He also got a large stake in the company. Ballmer was eventually made CEO of Microsoft. In 2014, Ballmer paid $2 billion to acquire the NBA's Los Angeles Clippers.

Sergey Brin and co-founded Google with Larry Page in 1998, after meeting at Stanford a few years earlier. Today, Brin oversees Google's parent company Alphabet as its president. He is working on a way to provide WiFi to rural communities using high altitude balloons.

#5 Larry Page

Net worth: $38 billion

Country: US

Industry: Technology

Source of wealth: Self-made; Google

Larry Page is the slightly wealthier Google founder. These days, Page is CEO of Google's parent company Alphabet. It was Page who came up with the algorithm at the heart of Google's search engine, which compiles results in a specific ranking. Page also led Google's acquisition of Android.

Julian Finney/Getty Images

#4 Larry Ellison

Net worth: $40 billion

Country: US

Industry: Tech

Source of wealth: Self-made; Oracle

Larry Ellison is the founder and CEO Oracle, one of the largest software companies in the world. He is so wealthy that he owns Lanai—one of the Hawaiian Islands. Ellison lives in a $200 million house on 45 acres in Silicon Valley. The mansion is modeled after a 16th century Japanese estate.

#3 Mark Zuckerberg

Net worth: $50 billion

Country: US

Industry: Technology

Source of wealth: Self-made; Facebook

Mark Zuckerberg famously developed Facebook while he was a student at Harvard. He subsequently dropped out and moved to Palo Alto to concentrate on Facebook. He and his wife Pricilla Chan have joined The Giving Pledge and vowed to give away 99% of their wealth during their lifetimes.

Jeff Bezos wrote the business plan for what would become Amazon during a cross country road trip with his wife. He single-handedly revolutionized the way we buy books—and after a while, also everything else under the sun from deodorant to chandeliers to scripted streaming television series. These days his focus is on the Washington Post, which he owns, as well as his space exploration company Blue Origin.

#1 Bill Gates

Net worth: $90 billion

Country: US

Industry: Tech

Source of wealth: Self-made; Microsoft

Bill Gates isn't just the wealthiest tech billionaire; he is the richest man on the planet. Gates has been a billionaire since Microsoft went public when he was 30. He is the co-founder of the software giant and one of the architects of The Giving Pledge. These days, he is a member of Microsoft's board and focuses his time on his philanthropic work. He has been vocal about his desire to not leave his children much of his fortune so that they are forced to make their own way in the world rather than live off his billions.

Amy Lamare is a Los Angeles based writer covering business, technology, entertainment, philanthropy, and pop culture. She spent 8 1/2 years covering the entertainment industry for www.hsx.com. She attended the University of Southern California where she majored in Creative Writing. An avid long distance runner, weekends she can be found running the streets of Los Angeles training for 1/2 and full marathons. Follow her on Facebook.